2 This file is part of GNUnet.
3 (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
40 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
41 * - speed requirement specification (change?) in mesh API -- API call
43 * - add connection confirmation message
44 * - handle trnsmt_rdy return values
48 #include "gnunet_common.h"
49 #include "gnunet_util_lib.h"
50 #include "gnunet_peer_lib.h"
51 #include "gnunet_core_service.h"
52 #include "gnunet_protocols.h"
55 #include "mesh_protocol.h"
56 #include "gnunet_dht_service.h"
58 #define MESH_DEBUG GNUNET_YES
62 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
63 * @param cls string to print
64 * @param tc task context
67 mesh_debug (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
71 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
75 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n", s);
79 /* TODO: move into configuration file */
80 #define CORE_QUEUE_SIZE 10
81 #define LOCAL_QUEUE_SIZE 100
82 #define REFRESH_PATH_TIME GNUNET_TIME_relative_multiply(\
83 GNUNET_TIME_UNIT_SECONDS,\
85 #define APP_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
86 GNUNET_TIME_UNIT_SECONDS,\
89 #define ID_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
90 GNUNET_TIME_UNIT_SECONDS,\
93 /******************************************************************************/
94 /************************ ENUMERATIONS ****************************/
95 /******************************************************************************/
98 * All the states a peer participating in a tunnel can be in.
103 * Peer only retransmits traffic, is not a final destination
108 * Path to the peer not known yet
113 * Request sent, not yet answered.
118 * Peer connected and ready to accept data
123 * Peer connected previosly but not responding
125 MESH_PEER_RECONNECTING
129 /******************************************************************************/
130 /************************ DATA STRUCTURES ****************************/
131 /******************************************************************************/
134 * Information regarding a possible path to reach a single peer
142 struct MeshPeerPath *next;
143 struct MeshPeerPath *prev;
146 * List of all the peers that form the path from origin to target.
148 GNUNET_PEER_Id *peers;
151 * Number of peers (hops) in the path
159 * Node of path tree for a tunnel
161 struct MeshTunnelPathNode
164 * Tunnel this node belongs to (and therefore tree)
166 struct MeshTunnel *t;
169 * Peer this node describes
171 struct MeshPeerInfo *peer;
174 * Parent node in the tree
176 struct MeshTunnelPathNode *parent;
181 struct MeshTunnelPathNode *children;
186 unsigned int nchildren;
189 * Status of the peer in the tunnel
191 enum MeshPeerState status;
196 * Tree to reach all peers in the tunnel
198 struct MeshTunnelPath
201 * Tunnel this path belongs to
203 struct MeshTunnel *t;
206 * Root node of peer tree
208 struct MeshTunnelPathNode *root;
211 * Node that represents our position in the tree (for non local tunnels)
213 struct MeshTunnelPathNode *me;
216 * Cache of all peers and the first hop to them.
217 * Indexed by Peer_Identity, contains a pointer to the PeerInfo of 1st hop.
219 struct GNUNET_CONTAINER_MultiHashMap *first_hops;
224 /** FWD declaration */
228 * Struct containing all info possibly needed to build a package when called
231 struct MeshDataDescriptor
233 /** ID of the tunnel this packet travels in */
234 struct MESH_TunnelID *origin;
236 /** Ultimate destination of the packet */
237 GNUNET_PEER_Id destination;
239 /** Number of identical messages sent to different hops (multicast) */
242 /** Size of the data */
245 /** Client that asked for the transmission, if any */
246 struct GNUNET_SERVER_Client *client;
248 /** Who was is message being sent to */
249 struct MeshPeerInfo *peer;
251 /** Which handler was used to request the transmission */
252 unsigned int handler_n;
254 /* Data at the end */
259 * Struct containing all information regarding a given peer
269 * Last time we heard from this peer
271 struct GNUNET_TIME_Absolute last_contact;
274 * Number of attempts to reconnect so far
276 int n_reconnect_attempts;
279 * Paths to reach the peer, ordered by ascending hop count
281 struct MeshPeerPath *path_head;
284 * Paths to reach the peer, ordered by ascending hop count
286 struct MeshPeerPath *path_tail;
289 * Handle to stop the DHT search for a path to this peer
291 struct GNUNET_DHT_GetHandle *dhtget;
294 * Handles to stop queued transmissions for this peer
296 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
299 * Pointer to info stuctures used as cls for queued transmissions
301 struct MeshDataDescriptor *infos[CORE_QUEUE_SIZE];
304 * Array of tunnels this peer participates in
305 * (most probably a small amount, therefore not a hashmap)
306 * When the path to the peer changes, notify these tunnels to let them
307 * re-adjust their path trees.
309 struct MeshTunnel **tunnels;
312 * Number of tunnels above
314 unsigned int ntunnels;
319 * Data scheduled to transmit (to local client or remote peer)
326 struct MeshQueue *next;
327 struct MeshQueue *prev;
330 * Target of the data (NULL if target is client)
332 struct MeshPeerInfo *peer;
335 * Client to send the data to (NULL if target is peer)
337 struct MeshClient *client;
340 * Size of the message to transmit
345 * How old is the data?
347 struct GNUNET_TIME_Absolute timestamp;
352 struct GNUNET_MessageHeader *data;
356 * Globally unique tunnel identification (owner + number)
357 * DO NOT USE OVER THE NETWORK
362 * Node that owns the tunnel
367 * Tunnel number to differentiate all the tunnels owned by the node oid
368 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
370 MESH_TunnelNumber tid;
374 struct MeshClient; /* FWD declaration */
377 * Struct containing all information regarding a tunnel
378 * For an intermediate node the improtant info used will be:
379 * - id Tunnel unique identification
380 * - paths[0] To know where to send it next
381 * - metainfo: ready, speeds, accounting
388 struct MESH_TunnelID id;
391 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
393 MESH_TunnelNumber local_tid;
396 * Last time the tunnel was used
398 struct GNUNET_TIME_Absolute timestamp;
401 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
403 struct GNUNET_CONTAINER_MultiHashMap *peers;
406 * Number of peers that are connected and potentially ready to receive data
408 unsigned int peers_ready;
411 * Number of peers that have been added to the tunnel
413 unsigned int peers_total;
416 * Client owner of the tunnel, if any
418 struct MeshClient *client;
421 * Messages ready to transmit
423 struct MeshQueue *queue_head;
424 struct MeshQueue *queue_tail;
429 struct MeshTunnelPath *paths;
432 * Task to keep the used paths alive
434 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
439 * Info needed to work with tunnel paths and peers
446 struct MeshTunnel *t;
451 struct MeshPeerInfo *peer;
456 struct MeshPeerPath *path;
461 * Struct containing information about a client of the service
468 struct MeshClient *next;
469 struct MeshClient *prev;
472 * Tunnels that belong to this client, indexed by local id
474 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
477 * Handle to communicate with the client
479 struct GNUNET_SERVER_Client *handle;
482 * Applications that this client has claimed to provide
484 struct GNUNET_CONTAINER_MultiHashMap *apps;
487 * Messages that this client has declared interest in
489 struct GNUNET_CONTAINER_MultiHashMap *types;
492 * Used to search peers offering a service
494 struct GNUNET_DHT_GetHandle *dht_get_type;
498 * ID of the client, for debug messages
505 /******************************************************************************/
506 /*********************** GLOBAL VARIABLES ****************************/
507 /******************************************************************************/
512 static struct MeshClient *clients;
513 static struct MeshClient *clients_tail;
516 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
518 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
521 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
523 static struct GNUNET_CONTAINER_MultiHashMap *peers;
526 * Handle to communicate with core
528 static struct GNUNET_CORE_Handle *core_handle;
533 static struct GNUNET_DHT_Handle *dht_handle;
538 static struct GNUNET_SERVER_Handle *server_handle;
541 * Notification context, to send messages to local clients
543 static struct GNUNET_SERVER_NotificationContext *nc;
546 * Local peer own ID (memory efficient handle)
548 static GNUNET_PEER_Id myid;
551 * Local peer own ID (full value)
553 static struct GNUNET_PeerIdentity my_full_id;
556 * Tunnel ID for the next created tunnel (global tunnel number)
558 static MESH_TunnelNumber next_tid;
561 * All application types provided by this peer
563 static struct GNUNET_CONTAINER_MultiHashMap *applications;
566 * All message types clients of this peer are interested in
568 static struct GNUNET_CONTAINER_MultiHashMap *types;
571 * Task to periodically announce provided applications
573 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
576 * Task to periodically announce itself in the network
578 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
581 unsigned int next_client_id;
585 /******************************************************************************/
586 /************************ PERIODIC FUNCTIONS ****************************/
587 /******************************************************************************/
590 * Announce iterator over for each application provided by the peer
593 * @param key current key code
594 * @param value value in the hash map
595 * @return GNUNET_YES if we should continue to
600 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
602 /* FIXME are hashes in multihash map equal on all aquitectures? */
603 GNUNET_DHT_put (dht_handle, key, 10U, GNUNET_DHT_RO_RECORD_ROUTE,
604 GNUNET_BLOCK_TYPE_TEST, sizeof (struct GNUNET_PeerIdentity),
605 (const char *) &my_full_id,
607 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
608 &mesh_debug, "DHT_put for app completed");
610 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
612 APP_ANNOUNCE_TIME, NULL, NULL);
619 * Periodically announce what applications are provided by local clients
622 * @param tc task context
625 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
627 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
629 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
633 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
635 announce_applications_task =
636 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
638 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
644 * Periodically announce self id in the DHT
647 * @param tc task context
650 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
652 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
654 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
658 * - Set data expiration in function of X
661 GNUNET_DHT_put (dht_handle, /* DHT handle */
662 &my_full_id.hashPubKey, /* Key to use */
663 10U, /* Replication level */
664 GNUNET_DHT_RO_RECORD_ROUTE, /* DHT options */
665 GNUNET_BLOCK_TYPE_TEST, /* Block type */
666 0, /* Size of the data */
667 NULL, /* Data itself */
668 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
669 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
671 &mesh_debug, "DHT_put for id completed");
673 NULL, /* Continuation */
674 NULL); /* Continuation closure */
677 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
682 * Send keepalive packets for a peer
690 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
692 struct MeshTunnel *t = cls;
694 // struct GNUNET_PeerIdentity id;
696 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
700 /* FIXME implement multicast keepalive. Just an empty multicast packet? */
701 // GNUNET_PEER_resolve (path_get_first_hop (path->t, path->peer)->id, &id);
702 // GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
703 // GNUNET_TIME_UNIT_FOREVER_REL, &id,
704 // sizeof (struct GNUNET_MESH_ManipulatePath)
706 // (path->path->length *
707 // sizeof (struct GNUNET_PeerIdentity)),
708 // &send_core_create_path,
710 t->path_refresh_task =
711 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
716 /******************************************************************************/
717 /****************** GENERAL HELPER FUNCTIONS ************************/
718 /******************************************************************************/
721 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
722 * and insert it in the appropiate structures if the peer is not known yet.
724 * @param peer Identity of the peer
726 * @return Existing or newly created peer info
728 static struct MeshPeerInfo *
729 peer_info_get (const struct GNUNET_PeerIdentity *peer)
731 struct MeshPeerInfo *peer_info;
733 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
734 if (NULL == peer_info)
737 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
738 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
739 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
740 peer_info->id = GNUNET_PEER_intern (peer);
749 * Destroy the peer_info and free any allocated resources linked to it
750 * @param t tunnel the path belongs to
751 * @param pi the peer_info to destroy
752 * @return GNUNET_OK on success
755 peer_info_destroy (struct MeshPeerInfo *pi)
757 GNUNET_HashCode hash;
758 struct GNUNET_PeerIdentity id;
760 GNUNET_PEER_resolve (pi->id, &id);
761 GNUNET_PEER_change_rc (pi->id, -1);
762 GNUNET_CRYPTO_hash (&id, sizeof (struct GNUNET_PeerIdentity), &hash);
764 GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi);
765 GNUNET_SCHEDULER_cancel (pi->path_refresh_task);
773 * Destroy the path and free any allocated resources linked to it
775 * @param p the path to destroy
777 * @return GNUNET_OK on success
780 path_destroy (struct MeshPeerPath *p)
782 GNUNET_PEER_decrement_rcs (p->peers, p->length);
783 GNUNET_free (p->peers);
792 * @param p the path to invert
795 path_invert (struct MeshPeerPath *path)
800 for (i = 0; i < path->length / 2; i++)
802 aux = path->peers[i];
803 path->peers[i] = path->peers[path->length - i - 1];
804 path->peers[path->length - i - 1] = aux;
810 * Find the first peer whom to send a packet to go down this path
812 * @param t The tunnel to use
813 * @param peer The peerinfo of the peer we are trying to reach
815 * @return peerinfo of the peer who is the first hop in the tunnel
818 static struct MeshPeerInfo *
819 path_get_first_hop (struct MeshTunnel *t, struct MeshPeerInfo *peer)
821 struct GNUNET_PeerIdentity id;
823 GNUNET_PEER_resolve (peer->id, &id);
824 return GNUNET_CONTAINER_multihashmap_get (t->paths->first_hops,
830 * Get the length of a path
832 * @param path The path to measure, with the local peer at any point of it
834 * @return Number of hops to reach destination
835 * UINT_MAX in case the peer is not in the path
838 path_get_length (struct MeshPeerPath *path)
844 for (i = 0; i < path->length; i++)
846 if (path->peers[i] == myid)
848 return path->length - i;
856 * Get the cost of the path relative to the already built tunnel tree
858 * @param t The tunnel to which compare
859 * @param path The individual path to reach a peer
861 * @return Number of hops to reach destination, UINT_MAX in case the peer is not
864 * TODO: remove dummy implementation, look into the tunnel tree
867 path_get_cost (struct MeshTunnel *t, struct MeshPeerPath *path)
869 return path_get_length (path);
874 * Add the path to the peer and update the path used to reach it in case this
877 * @param peer_info Destination peer to add the path to.
878 * @param path New path to add. Last peer must be the peer in arg 1.
880 * TODO: trim the part from origin to us? Add it as path to origin?
883 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
886 struct MeshPeerPath *aux;
888 if (NULL == peer_info || NULL == path)
894 l = path_get_length (path);
896 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
898 if (path_get_length (aux) > l)
900 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
901 peer_info->path_tail, aux, path);
904 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
911 * Notify a tunnel that a connection has broken that affects at least
914 * @param t Tunnel affected
915 * @param peer Peer that (at least) has been affected by the disconnection
916 * @param p1 Peer that got disconnected from p2
917 * @param p2 Peer that got disconnected from p1
920 tunnel_notify_connection_broken (struct MeshTunnel *t,
921 struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
926 * Remove all paths that rely on a direct connection between p1 and p2
927 * from the peer itself and notify all tunnels about it.
929 * @param pi PeerInfo of affected peer
930 * @param p1 GNUNET_PEER_Id of one peer.
931 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
935 path_remove_from_peer (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
938 struct MeshPeerPath *p;
939 struct MeshPeerPath *aux;
940 unsigned int destroyed;
948 for (i = 0; i < (p->length - 1); i++)
950 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
951 (p->peers[i] == p2 && p->peers[i + 1] == p1))
963 for (i = 0; i < peer->ntunnels; i++)
965 tunnel_notify_connection_broken (peer->tunnels[i], peer, p1, p2);
971 * Add the path to the origin peer and update the path used to reach it in case
972 * this is the shortest.
973 * The path is given in peer_info -> destination, therefore we turn the path
976 * @param peer_info Peer to add the path to, being the origin of the path.
977 * @param path New path to add after being inversed.
980 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
983 path_add_to_peer (peer_info, path);
988 * Build a PeerPath from the paths returned from the DHT, reversing the paths
989 * to obtain a local peer -> destination path and interning the peer ids.
991 * @param get_path NULL-terminated array of pointers
992 * to the peers on reverse GET path (or NULL if not recorded)
993 * @param put_path NULL-terminated array of pointers
994 * to the peers on the PUT path (or NULL if not recorded)
996 * @return Newly allocated and created path
998 static struct MeshPeerPath *
999 path_build_from_dht (const struct GNUNET_PeerIdentity *const *get_path,
1000 const struct GNUNET_PeerIdentity *const *put_path)
1002 struct MeshPeerPath *p;
1005 p = GNUNET_malloc (sizeof (struct MeshPeerPath));
1006 for (i = 0; get_path[i] != NULL; i++) ;
1007 for (i--; i >= 0; i--)
1010 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1011 p->peers[p->length] = GNUNET_PEER_intern (get_path[i]);
1014 for (i = 0; put_path[i] != NULL; i++) ;
1015 for (i--; i >= 0; i--)
1018 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1019 p->peers[p->length] = GNUNET_PEER_intern (put_path[i]);
1027 * Check if client has registered with the service and has not disconnected
1029 * @param client the client to check
1031 * @return non-NULL if client exists in the global DLL
1033 static struct MeshClient *
1034 client_get (struct GNUNET_SERVER_Client *client)
1036 struct MeshClient *c;
1041 if (c->handle == client)
1050 * Checks if a given client has subscribed to certain message type
1052 * @param message_type Type of message to check
1053 * @param c Client to check
1055 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
1060 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
1064 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
1065 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
1070 * Search for a tunnel among the tunnels for a client
1072 * @param c the client whose tunnels to search in
1073 * @param tid the local id of the tunnel
1075 * @return tunnel handler, NULL if doesn't exist
1077 static struct MeshTunnel *
1078 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1080 GNUNET_HashCode hash;
1082 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1083 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1088 * Search for a tunnel by global ID using PEER_ID
1090 * @param pi owner of the tunnel
1091 * @param tid global tunnel number
1093 * @return tunnel handler, NULL if doesn't exist
1095 static struct MeshTunnel *
1096 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1098 struct MESH_TunnelID id;
1099 GNUNET_HashCode hash;
1104 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1105 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1111 * Search for a tunnel by global ID using full PeerIdentities
1113 * @param oid owner of the tunnel
1114 * @param tid global tunnel number
1116 * @return tunnel handler, NULL if doesn't exist
1118 static struct MeshTunnel *
1119 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1121 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1126 * Recursively find the given peer in the tree.
1128 * @param t Tunnel where to add the new path.
1129 * @param p Path to look for.
1131 * @return Pointer to the node of the peer. NULL if not found.
1133 static struct MeshTunnelPathNode *
1134 tunnel_find_peer (struct MeshTunnelPathNode *root, struct MeshPeerInfo *peer)
1136 struct MeshTunnelPathNode *n;
1139 if (root->peer == peer)
1141 for (i = 0; i < root->nchildren; i++)
1143 n = tunnel_find_peer (&root->children[i], peer);
1152 * Recusively mark peer and children as disconnected, notify client
1154 * @param parent Node to be clean, potentially with children
1157 tunnel_mark_peers_disconnected (struct MeshTunnelPathNode *parent)
1159 struct GNUNET_MESH_PeerControl msg;
1162 parent->status = MESH_PEER_RECONNECTING;
1163 for (i = 0; i < parent->nchildren; i++)
1165 tunnel_mark_peers_disconnected (&parent->children[i]);
1167 if (NULL == parent->t->client)
1169 msg.header.size = htons (sizeof (msg));
1170 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1171 msg.tunnel_id = htonl (parent->t->local_tid);
1172 GNUNET_PEER_resolve (parent->peer->id, &msg.peer);
1173 GNUNET_SERVER_notification_context_unicast (nc, parent->t->client->handle,
1174 &msg.header, GNUNET_NO);
1178 * Delete the current path to the peer, including all now unused relays.
1179 * The destination peer is NOT destroyed, it is returned in order to either set
1180 * a new path to it or destroy it explicitly, taking care of it's child nodes.
1182 * @param t Tunnel where to delete the path from.
1183 * @param peer Destination peer whose path we want to remove.
1185 * @return pointer to the pathless node, NULL on error
1187 * TODO: notify peers of deletion
1189 static struct MeshTunnelPathNode *
1190 tunnel_del_path (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1192 struct MeshTunnelPathNode *parent;
1193 struct MeshTunnelPathNode *node;
1194 struct MeshTunnelPathNode *n;
1196 node = n = tunnel_find_peer (t->paths->me, peer);
1201 while (NULL != parent && MESH_PEER_RELAY == parent->status &&
1202 1 == parent->nchildren)
1205 GNUNET_free (parent->children);
1206 parent = parent->parent;
1210 *n = parent->children[parent->nchildren - 1];
1211 parent->nchildren--;
1212 parent->children = GNUNET_realloc (parent->children, parent->nchildren);
1214 tunnel_mark_peers_disconnected (node);
1221 * Return a newly allocated individual path to reach a peer from the local peer,
1222 * according to the path tree of some tunnel.
1224 * @param t Tunnel from which to read the path tree
1225 * @param peer_info Destination peer to whom we want a path
1227 * @return A newly allocated individual path to reach the destination peer.
1228 * Path must be destroyed afterwards.
1230 static struct MeshPeerPath *
1231 tunnel_get_path_to_peer(struct MeshTunnel *t, struct MeshPeerInfo *peer_info)
1233 struct MeshTunnelPathNode *n;
1234 struct MeshPeerPath *p;
1236 n = tunnel_find_peer(t->paths->me, peer_info);
1237 p = GNUNET_malloc(sizeof(struct MeshPeerPath));
1239 /* Building the path (inverted!) */
1240 while (n->peer->id != myid)
1242 GNUNET_array_append(p->peers, p->length, n->peer->id);
1243 GNUNET_PEER_change_rc(n->peer->id, 1);
1245 GNUNET_assert(NULL != n);
1247 GNUNET_array_append(p->peers, p->length, myid);
1248 GNUNET_PEER_change_rc(myid, 1);
1257 * Integrate a stand alone path into the tunnel tree.
1259 * @param t Tunnel where to add the new path.
1260 * @param p Path to be integrated.
1262 * @return GNUNET_OK in case of success.
1263 * GNUNET_SYSERR in case of error.
1266 * - go backwards on path looking for each peer in the present tree
1269 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p)
1271 struct MeshTunnelPathNode *parent;
1272 struct MeshTunnelPathNode *oldnode;
1273 struct MeshTunnelPathNode *n;
1274 struct GNUNET_PeerIdentity id;
1275 struct GNUNET_PeerIdentity hop;
1281 if (n->peer->id != p->peers[0])
1283 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
1284 "local id's: %u %s\n",
1286 GNUNET_h2s_full(&my_full_id.hashPubKey));
1287 GNUNET_PEER_resolve(n->peer->id, &id);
1288 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
1290 GNUNET_h2s_full(&id.hashPubKey));
1291 GNUNET_PEER_resolve (p->peers[0], &id);
1292 GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
1294 GNUNET_h2s_full(&id.hashPubKey));
1297 return GNUNET_SYSERR;
1299 /* Ignore return value, if not found it's ok. */
1300 GNUNET_PEER_resolve (p->peers[p->length - 1], &id);
1301 oldnode = tunnel_del_path (t, peer_info_get (&id));
1302 /* Look for the first node that is not already present in the tree
1304 * Assuming that the tree is somewhat balanced, O(log n * log N).
1305 * - Length of the path is expected to be log N (size of whole network).
1306 * - Each level of the tree is expected to have log n children (size of tree).
1308 for (i = 1, me = -1; i < p->length; i++)
1311 if (p->peers[i] == myid)
1313 for (j = 0; j < n->nchildren; j++)
1315 if (n->children[j].peer->id == p->peers[i])
1317 n = &n->children[j];
1321 /* If we couldn't find a child equal to path[i], we have reached the end
1322 * of the common path. */
1328 /* New path deviates from tree before reaching us. What happened? */
1330 return GNUNET_SYSERR;
1332 /* Add the rest of the path as a branch from parent. */
1333 while (i < p->length)
1335 parent->nchildren++;
1336 parent->children = GNUNET_realloc (parent->children,
1338 sizeof(struct MeshTunnelPathNode));
1339 n = &parent->children[parent->nchildren - 1];
1340 if (i == p->length - 1 && NULL != oldnode)
1342 /* Assignation and free can be misleading, using explicit mempcy */
1343 memcpy (n, oldnode, sizeof (struct MeshTunnelPathNode));
1344 GNUNET_free (oldnode);
1349 n->status = MESH_PEER_RELAY;
1350 GNUNET_PEER_resolve (p->peers[i], &id);
1351 n->peer = peer_info_get (&id);
1358 /* Add info about first hop into hashmap. */
1359 if (me < p->length - 1)
1361 GNUNET_PEER_resolve (p->peers[p->length - 1], &id);
1362 GNUNET_PEER_resolve (p->peers[me + 1], &hop);
1363 GNUNET_CONTAINER_multihashmap_put (t->paths->first_hops, &id.hashPubKey,
1364 peer_info_get (&hop),
1365 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1372 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1373 * needed rescources.
1375 * @param t Tunnel we want to add a new peer to
1376 * @param peer PeerInfo of the peer being added
1380 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1382 struct MeshPeerPath *p;
1383 struct MeshPeerPath *best_p;
1384 unsigned int best_cost;
1387 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1388 if (NULL == (p = peer->path_head))
1392 best_cost = UINT_MAX;
1395 if ((cost = path_get_cost (t, p)) < best_cost)
1402 tunnel_add_path (t, best_p);
1403 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1404 t->path_refresh_task =
1405 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
1410 * Notify a tunnel that a connection has broken that affects at least
1411 * some of its peers.
1413 * @param t Tunnel affected
1414 * @param peer Peer that (at least) has been affected by the disconnection
1415 * @param p1 Peer that got disconnected from p2
1416 * @param p2 Peer that got disconnected from p1
1421 tunnel_notify_connection_broken (struct MeshTunnel *t,
1422 struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1429 * Recursively destory the path tree of a tunnel.
1430 * Note: it does not liberate memory for itself, parent must do it!
1432 * @param n The node to destroy, along with children.
1434 * @return GNUNET_OK on success
1437 tunnel_destroy_tree_node (struct MeshTunnelPathNode *n)
1441 for (i = 0; i < n->nchildren; i++)
1443 tunnel_destroy_tree_node(&n->children[i]);
1445 if (NULL != n->children)
1446 GNUNET_free (n->children);
1451 * Destroy the tunnel and free any allocated resources linked to it
1453 * @param t the tunnel to destroy
1455 * @return GNUNET_OK on success
1458 tunnel_destroy (struct MeshTunnel *t)
1460 struct MeshClient *c;
1461 struct MeshQueue *q;
1462 struct MeshQueue *qn;
1463 GNUNET_HashCode hash;
1466 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DESTROYING TUNNEL at %p\n", t);
1472 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1475 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1476 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
1481 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1482 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
1486 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
1490 if (NULL != q->data)
1491 GNUNET_free (q->data);
1495 /* TODO cancel core transmit ready in case it was active */
1498 GNUNET_CONTAINER_multihashmap_destroy(t->paths->first_hops);
1499 tunnel_destroy_tree_node(t->paths->root);
1500 GNUNET_free(t->paths->root);
1501 GNUNET_free (t->paths);
1508 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
1509 * client when the client disconnects.
1511 * @param cls closure (client that is disconnecting)
1512 * @param key the hash of the local tunnel id (used to access the hashmap)
1513 * @param value the value stored at the key (tunnel to destroy)
1515 * @return GNUNET_OK on success
1518 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
1522 r = tunnel_destroy ((struct MeshTunnel *) value);
1527 /******************************************************************************/
1528 /**************** MESH NETWORK HANDLER HELPERS ***********************/
1529 /******************************************************************************/
1533 * Function called to notify a client about the socket
1534 * being ready to queue more data. "buf" will be
1535 * NULL and "size" zero if the socket was closed for
1536 * writing in the meantime.
1538 * @param cls closure
1539 * @param size number of bytes available in buf
1540 * @param buf where the callee should write the message
1541 * @return number of bytes written to buf
1544 send_core_create_path (void *cls, size_t size, void *buf)
1546 struct MeshPathInfo *info = cls;
1547 struct GNUNET_MESH_ManipulatePath *msg;
1548 struct GNUNET_PeerIdentity *peer_ptr;
1549 struct GNUNET_PeerIdentity id;
1550 struct MeshPeerInfo *peer = info->peer;
1551 struct MeshTunnel *t = info->t;
1552 struct MeshPeerPath *p = info->path;
1557 sizeof (struct GNUNET_MESH_ManipulatePath) +
1558 p->length * sizeof (struct GNUNET_PeerIdentity);
1560 if (size < size_needed || NULL == buf)
1562 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Retransmitting create path\n");
1563 GNUNET_PEER_resolve (path_get_first_hop (t, peer)->id, &id);
1564 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1565 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1566 size_needed, &send_core_create_path,
1571 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
1572 msg->header.size = htons (size_needed);
1573 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
1574 msg->tid = ntohl (t->id.tid);
1576 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
1577 for (i = 0; i < p->length; i++)
1579 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
1591 * Function called to notify a client about the socket
1592 * being ready to queue more data. "buf" will be
1593 * NULL and "size" zero if the socket was closed for
1594 * writing in the meantime.
1596 * @param cls closure (MeshDataDescriptor with all info to build packet)
1597 * @param size number of bytes available in buf
1598 * @param buf where the callee should write the message
1599 * @return number of bytes written to buf
1602 send_core_data_to_origin (void *cls, size_t size, void *buf)
1604 struct MeshDataDescriptor *info = cls;
1605 struct GNUNET_MESH_ToOrigin *msg = buf;
1608 GNUNET_assert (NULL != info);
1609 total_size = sizeof (struct GNUNET_MESH_ToOrigin) + info->size;
1610 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1612 if (total_size > size)
1614 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1615 "not enough buffer to send data to origin\n");
1618 msg->header.size = htons (total_size);
1619 msg->header.type = htons (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
1620 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1621 msg->tid = htonl (info->origin->tid);
1622 if (0 != info->size)
1624 memcpy (&msg[1], &info[1], info->size);
1626 if (NULL != info->client)
1628 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1636 * Function called to notify a client about the socket
1637 * being ready to queue more data. "buf" will be
1638 * NULL and "size" zero if the socket was closed for
1639 * writing in the meantime.
1641 * @param cls closure (data itself)
1642 * @param size number of bytes available in buf
1643 * @param buf where the callee should write the message
1644 * @return number of bytes written to buf
1647 send_core_data_unicast (void *cls, size_t size, void *buf)
1649 struct MeshDataDescriptor *info = cls;
1650 struct GNUNET_MESH_Unicast *msg = buf;
1653 GNUNET_assert (NULL != info);
1654 total_size = sizeof (struct GNUNET_MESH_Unicast) + info->size;
1655 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1657 if (total_size > size)
1659 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1660 "not enough buffer to send data to peer\n");
1663 msg->header.size = htons (total_size);
1664 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_UNICAST);
1665 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1666 GNUNET_PEER_resolve (info->destination, &msg->destination);
1667 msg->tid = htonl (info->origin->tid);
1668 if (0 != info->size)
1670 memcpy (&msg[1], &info[1], info->size);
1672 if (NULL != info->client)
1674 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1682 * Function called to notify a client about the socket
1683 * being ready to queue more data. "buf" will be
1684 * NULL and "size" zero if the socket was closed for
1685 * writing in the meantime.
1687 * @param cls closure (data itself)
1688 * @param size number of bytes available in buf
1689 * @param buf where the callee should write the message
1690 * @return number of bytes written to buf
1693 send_core_data_multicast (void *cls, size_t size, void *buf)
1695 struct MeshDataDescriptor *info = cls;
1696 struct GNUNET_MESH_Multicast *msg = buf;
1699 GNUNET_assert (NULL != info);
1700 total_size = info->size + sizeof (struct GNUNET_MESH_Multicast);
1701 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1705 info->peer->core_transmit[info->handler_n] = NULL;
1707 if (total_size > size)
1709 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1710 "not enough buffer to send data futher\n");
1713 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1714 msg->header.size = htons (total_size);
1715 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1716 msg->tid = htonl (info->origin->tid);
1717 memcpy (&msg[1], &info[1], total_size);
1718 if (0 == --info->copies)
1720 if (NULL != info->client)
1722 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1731 * Function called to notify a client about the socket
1732 * being ready to queue more data. "buf" will be
1733 * NULL and "size" zero if the socket was closed for
1734 * writing in the meantime.
1736 * @param cls closure (MeshDataDescriptor)
1737 * @param size number of bytes available in buf
1738 * @param buf where the callee should write the message
1739 * @return number of bytes written to buf
1742 send_core_path_ack (void *cls, size_t size, void *buf)
1744 struct MeshDataDescriptor *info = cls;
1745 struct GNUNET_MESH_PathACK *msg = buf;
1747 GNUNET_assert (NULL != info);
1750 info->peer->core_transmit[info->handler_n] = NULL;
1752 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1757 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1758 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1759 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1760 msg->tid = htonl (info->origin->tid);
1761 msg->peer_id = my_full_id;
1763 /* TODO add signature */
1765 return sizeof (struct GNUNET_MESH_PathACK);
1770 * Function called to notify a client about the socket
1771 * being ready to queue more data. "buf" will be
1772 * NULL and "size" zero if the socket was closed for
1773 * writing in the meantime.
1775 * @param cls closure (data itself)
1776 * @param size number of bytes available in buf
1777 * @param buf where the callee should write the message
1778 * @return number of bytes written to buf
1781 send_core_data_raw (void *cls, size_t size, void *buf)
1783 struct GNUNET_MessageHeader *msg = cls;
1786 GNUNET_assert (NULL != msg);
1787 total_size = ntohs (msg->size);
1789 if (total_size > size)
1794 memcpy (buf, msg, total_size);
1802 * Send another peer a notification to destroy a tunnel
1803 * @param cls The tunnel to destroy
1804 * @param size Size in the buffer
1805 * @param buf Memory where to put the data to transmit
1806 * @return Size of data put in buffer
1809 send_p2p_tunnel_destroy (void *cls, size_t size, void *buf)
1811 struct MeshTunnel *t = cls;
1812 struct MeshClient *c;
1813 struct GNUNET_MESH_TunnelMessage *msg;
1817 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1818 /*FIXME*/ msg->header.size =
1819 htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1820 msg->tunnel_id = htonl (t->id.tid);
1822 tunnel_destroy (c, t);
1823 return sizeof (struct GNUNET_MESH_TunnelMessage);
1829 * Send the message to all clients that have subscribed to its type
1831 * @param msg Pointer to the message itself
1832 * @return number of clients this message was sent to
1835 send_subscribed_clients (struct GNUNET_MessageHeader *msg)
1837 struct MeshClient *c;
1841 type = ntohs (msg->type);
1842 for (count = 0, c = clients; c != NULL; c = c->next)
1844 if (client_is_subscribed (type, c))
1847 GNUNET_SERVER_notification_context_unicast (nc, c->handle, msg,
1856 * Iterator over hash map peer entries collect all neighbors who to resend the
1859 * @param cls closure (**GNUNET_PEER_Id to store hops to send packet)
1860 * @param key current key code (peer id hash)
1861 * @param value value in the hash map (peer_info)
1862 * @return GNUNET_YES if we should continue to iterate, GNUNET_NO if not.
1865 iterate_collect_neighbors (void *cls, const GNUNET_HashCode * key, void *value)
1867 struct MeshPeerInfo *peer_info = value;
1868 struct MeshPathInfo *neighbors = cls;
1871 if (peer_info->id == myid)
1875 peer_info = path_get_first_hop (neighbors->t, peer_info);
1876 for (i = 0; i < neighbors->path->length; i++)
1878 if (neighbors->path->peers[i] == peer_info->id)
1881 GNUNET_array_append (neighbors->path->peers, neighbors->path->length,
1888 /******************************************************************************/
1889 /******************** MESH NETWORK HANDLERS **************************/
1890 /******************************************************************************/
1894 * Core handler for path creation
1895 * struct GNUNET_CORE_MessageHandler
1897 * @param cls closure
1898 * @param message message
1899 * @param peer peer identity this notification is about
1900 * @param atsi performance data
1901 * @return GNUNET_OK to keep the connection open,
1902 * GNUNET_SYSERR to close it (signal serious error)
1906 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
1907 const struct GNUNET_MessageHeader *message,
1908 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1910 unsigned int own_pos;
1913 MESH_TunnelNumber tid;
1914 struct GNUNET_MESH_ManipulatePath *msg;
1915 struct GNUNET_PeerIdentity *pi;
1916 struct GNUNET_PeerIdentity id;
1917 GNUNET_HashCode hash;
1918 struct MeshPeerPath *path;
1919 struct MeshPeerInfo *dest_peer_info;
1920 struct MeshPeerInfo *orig_peer_info;
1921 struct MeshTunnel *t;
1923 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1924 "MESH: Received a MESH path create msg\n");
1925 size = ntohs (message->size);
1926 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
1928 GNUNET_break_op (0);
1932 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
1933 if (size % sizeof (struct GNUNET_PeerIdentity))
1935 GNUNET_break_op (0);
1938 size /= sizeof (struct GNUNET_PeerIdentity);
1941 GNUNET_break_op (0);
1944 msg = (struct GNUNET_MESH_ManipulatePath *) message;
1946 tid = ntohl (msg->tid);
1947 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1948 t = tunnel_get (pi, tid);
1952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
1953 t = GNUNET_malloc (sizeof (struct MeshTunnel));
1954 t->id.oid = GNUNET_PEER_intern (pi);
1956 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
1958 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1960 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
1961 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1969 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
1970 if (NULL == dest_peer_info)
1972 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1973 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
1974 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
1976 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1978 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
1979 if (NULL == orig_peer_info)
1981 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1982 orig_peer_info->id = GNUNET_PEER_intern (pi);
1983 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
1984 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1987 path = GNUNET_malloc (sizeof (struct MeshPeerPath));
1988 path->length = size;
1989 path->peers = GNUNET_malloc (size * sizeof (GNUNET_PEER_Id));
1991 for (i = 0; i < size; i++)
1993 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
1994 if (path->peers[i] == myid)
1998 { /* cannot be self, must be 'not found' */
1999 /* create path: self not found in path through self */
2000 GNUNET_break_op (0);
2001 path_destroy (path);
2002 /* FIXME error. destroy tunnel? leave for timeout? */
2005 if (own_pos == size - 1)
2007 /* It is for us! Send ack. */
2008 struct MeshDataDescriptor *info;
2011 path_add_to_origin (orig_peer_info, path); /* inverts path! */
2012 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2013 info->origin = &t->id;
2014 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
2015 GNUNET_assert (info->peer);
2016 for (j = 0; info->peer->core_transmit[j]; j++)
2024 info->handler_n = j;
2025 info->peer->core_transmit[j] =
2026 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2027 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2028 sizeof (struct GNUNET_MessageHeader),
2029 &send_core_path_ack, info);
2033 /* It's for somebody else! Retransmit. */
2034 struct MeshPathInfo *path_info;
2036 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2038 path_info->path = path;
2039 path_info->peer = dest_peer_info;
2041 path_add_to_peer (dest_peer_info, path);
2042 GNUNET_PEER_resolve (path->peers[own_pos + 1], &id);
2043 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2044 GNUNET_TIME_UNIT_FOREVER_REL, &id,
2045 sizeof (struct GNUNET_MessageHeader),
2046 &send_core_create_path, path_info);
2053 * Core handler for mesh network traffic going from the origin to a peer
2055 * @param cls closure
2056 * @param peer peer identity this notification is about
2057 * @param message message
2058 * @param atsi performance data
2059 * @return GNUNET_OK to keep the connection open,
2060 * GNUNET_SYSERR to close it (signal serious error)
2063 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2064 const struct GNUNET_MessageHeader *message,
2065 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2067 struct GNUNET_MESH_Unicast *msg;
2068 struct GNUNET_PeerIdentity id;
2069 struct MeshTunnel *t;
2070 struct MeshPeerInfo *pi;
2073 size = ntohs (message->size);
2075 sizeof (struct GNUNET_MESH_Unicast) +
2076 sizeof (struct GNUNET_MessageHeader))
2081 msg = (struct GNUNET_MESH_Unicast *) message;
2082 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2085 /* TODO notify back: we don't know this tunnel */
2088 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
2089 &msg->destination.hashPubKey);
2092 /* TODO maybe feedback, log to statistics */
2097 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
2100 GNUNET_PEER_resolve (path_get_first_hop (t, pi)->id, &id);
2101 msg = GNUNET_malloc (size);
2102 memcpy (msg, message, size);
2103 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2104 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
2105 &send_core_data_raw, msg);
2111 * Core handler for mesh network traffic going from the origin to all peers
2113 * @param cls closure
2114 * @param message message
2115 * @param peer peer identity this notification is about
2116 * @param atsi performance data
2117 * @return GNUNET_OK to keep the connection open,
2118 * GNUNET_SYSERR to close it (signal serious error)
2121 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2122 const struct GNUNET_MessageHeader *message,
2123 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2125 struct GNUNET_MESH_Multicast *msg;
2126 struct GNUNET_PeerIdentity id;
2127 struct MeshDataDescriptor *info;
2128 struct MeshPathInfo neighbors;
2129 struct MeshTunnel *t;
2135 size = ntohs (message->size);
2137 sizeof (struct GNUNET_MESH_Multicast) +
2138 sizeof (struct GNUNET_MessageHeader))
2140 GNUNET_break_op (0);
2143 msg = (struct GNUNET_MESH_Multicast *) message;
2144 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2148 /* TODO notify that we dont know that tunnel */
2152 /* Transmit to locally interested clients */
2153 if (GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2155 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
2158 /* Retransmit to other peers.
2159 * Using path here as just a collection of peers, not a path per se.
2162 neighbors.path = GNUNET_malloc (sizeof (struct MeshPeerPath));
2163 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &iterate_collect_neighbors,
2165 if (0 == neighbors.path->length)
2167 GNUNET_free (neighbors.path);
2170 size -= sizeof (struct GNUNET_MESH_Multicast);
2171 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor) + size);
2172 info->origin = &t->id;
2173 info->copies = neighbors.path->length;
2174 for (i = 0; i < info->copies; i++)
2176 GNUNET_PEER_resolve (neighbors.path->peers[i], &id);
2177 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
2178 GNUNET_assert (NULL != info->peer);
2179 for (j = 0; 0 != info->peer->core_transmit[j]; j++)
2181 if (j == (CORE_QUEUE_SIZE - 1))
2187 info->handler_n = j;
2188 info->peer->infos[j] = info;
2189 info->peer->core_transmit[j] =
2190 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2191 GNUNET_TIME_UNIT_FOREVER_REL, &id,
2192 ntohs (msg->header.size),
2193 &send_core_data_multicast, info);
2195 GNUNET_free (neighbors.path->peers);
2196 GNUNET_free (neighbors.path);
2202 * Core handler for mesh network traffic
2204 * @param cls closure
2205 * @param message message
2206 * @param peer peer identity this notification is about
2207 * @param atsi performance data
2209 * @return GNUNET_OK to keep the connection open,
2210 * GNUNET_SYSERR to close it (signal serious error)
2213 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2214 const struct GNUNET_MessageHeader *message,
2215 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2217 struct GNUNET_MESH_ToOrigin *msg;
2218 struct GNUNET_PeerIdentity id;
2219 struct MeshPeerInfo *peer_info;
2220 struct MeshTunnel *t;
2223 size = ntohs (message->size);
2224 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2225 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2227 GNUNET_break_op (0);
2230 msg = (struct GNUNET_MESH_ToOrigin *) message;
2231 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2235 /* TODO notify that we dont know this tunnel (whom)? */
2239 if (t->id.oid == myid)
2241 if (NULL == t->client)
2243 /* got data packet for ownerless tunnel */
2244 GNUNET_break_op (0);
2247 /* TODO signature verification */
2248 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, message,
2252 peer_info = peer_info_get (&msg->oid);
2253 if (NULL == peer_info)
2255 /* unknown origin of tunnel */
2259 GNUNET_PEER_resolve (t->paths->me->parent->peer->id, &id);
2260 msg = GNUNET_malloc (size);
2261 memcpy (msg, message, size);
2262 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2263 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
2264 &send_core_data_raw, msg);
2271 * Core handler for path ACKs
2273 * @param cls closure
2274 * @param message message
2275 * @param peer peer identity this notification is about
2276 * @param atsi performance data
2278 * @return GNUNET_OK to keep the connection open,
2279 * GNUNET_SYSERR to close it (signal serious error)
2281 * FIXME path change state
2284 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2285 const struct GNUNET_MessageHeader *message,
2286 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2288 struct GNUNET_MESH_PathACK *msg;
2289 struct GNUNET_PeerIdentity id;
2290 struct MeshTunnel *t;
2291 struct MeshPeerInfo *peer_info;
2293 msg = (struct GNUNET_MESH_PathACK *) message;
2294 t = tunnel_get (&msg->oid, msg->tid);
2297 /* TODO notify that we don't know the tunnel */
2301 /* Message for us? */
2302 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2304 struct GNUNET_MESH_PeerControl pc;
2306 if (NULL == t->client)
2311 peer_info = peer_info_get (&msg->peer_id);
2312 if (NULL == peer_info)
2314 GNUNET_break_op (0);
2317 /* FIXME change state of peer */
2318 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
2319 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2320 pc.tunnel_id = htonl (t->local_tid);
2321 GNUNET_PEER_resolve (peer_info->id, &pc.peer);
2322 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
2323 &pc.header, GNUNET_NO);
2327 peer_info = peer_info_get (&msg->oid);
2328 if (NULL == peer_info)
2330 /* If we know the tunnel, we should DEFINITELY know the peer */
2334 GNUNET_PEER_resolve (path_get_first_hop (t, peer_info)->id, &id);
2335 msg = GNUNET_malloc (sizeof (struct GNUNET_MESH_PathACK));
2336 memcpy (msg, message, sizeof (struct GNUNET_MESH_PathACK));
2337 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2338 GNUNET_TIME_UNIT_FOREVER_REL, &id,
2339 sizeof (struct GNUNET_MESH_PathACK),
2340 &send_core_data_raw, msg);
2346 * Functions to handle messages from core
2348 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2349 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2350 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2351 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2352 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2353 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2354 sizeof (struct GNUNET_MESH_PathACK)},
2360 /******************************************************************************/
2361 /**************** MESH LOCAL HANDLER HELPERS ***********************/
2362 /******************************************************************************/
2365 * deregister_app: iterator for removing each application registered by a client
2367 * @param cls closure
2368 * @param key the hash of the application id (used to access the hashmap)
2369 * @param value the value stored at the key (client)
2371 * @return GNUNET_OK on success
2374 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
2376 GNUNET_CONTAINER_multihashmap_remove (applications, key, value);
2382 * notify_client_connection_failure: notify a client that the connection to the
2383 * requested remote peer is not possible (for instance, no route found)
2384 * Function called when the socket is ready to queue more data. "buf" will be
2385 * NULL and "size" zero if the socket was closed for writing in the meantime.
2387 * @param cls closure
2388 * @param size number of bytes available in buf
2389 * @param buf where the callee should write the message
2390 * @return number of bytes written to buf
2393 notify_client_connection_failure (void *cls, size_t size, void *buf)
2396 struct MeshPeerInfo *peer_info;
2397 struct GNUNET_MESH_PeerControl *msg;
2398 struct GNUNET_PeerIdentity id;
2400 if (0 == size && NULL == buf)
2402 // TODO retry? cancel?
2406 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
2407 peer_info = (struct MeshPeerInfo *) cls;
2408 msg = (struct GNUNET_MESH_PeerControl *) buf;
2409 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2410 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
2411 // msg->tunnel_id = htonl(peer_info->t->tid);
2412 GNUNET_PEER_resolve (peer_info->id, &id);
2413 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
2421 * Function to process paths received for a new peer addition. The recorded
2422 * paths form the initial tunnel, which can be optimized later.
2423 * Called on each result obtained for the DHT search.
2425 * @param cls closure
2426 * @param exp when will this value expire
2427 * @param key key of the result
2428 * @param get_path NULL-terminated array of pointers
2429 * to the peers on reverse GET path (or NULL if not recorded)
2430 * @param put_path NULL-terminated array of pointers
2431 * to the peers on the PUT path (or NULL if not recorded)
2432 * @param type type of the result
2433 * @param size number of bytes in data
2434 * @param data pointer to the result data
2439 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2440 const GNUNET_HashCode * key,
2441 const struct GNUNET_PeerIdentity *const *get_path,
2442 const struct GNUNET_PeerIdentity *const *put_path,
2443 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
2445 struct MeshPathInfo *path_info = cls;
2446 struct MeshPeerPath *p;
2447 struct GNUNET_PeerIdentity pi;
2450 if (NULL == get_path || NULL == put_path)
2452 if (NULL == path_info->peer->path_head)
2454 // Find ourselves some alternate initial path to the destination: retry
2455 GNUNET_DHT_get_stop (path_info->peer->dhtget);
2456 GNUNET_PEER_resolve (path_info->peer->id, &pi);
2457 path_info->peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
2458 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2459 GNUNET_BLOCK_TYPE_TEST, /* type */
2460 &pi.hashPubKey, /*key to search */
2461 4, /* replication level */
2462 GNUNET_DHT_RO_RECORD_ROUTE, NULL, /* bloom filter */
2465 0, /* xquery bits */
2467 (void *) path_info);
2472 p = path_build_from_dht (get_path, put_path);
2473 path_add_to_peer (path_info->peer, p);
2474 for (i = 0; i < path_info->peer->ntunnels; i++)
2476 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
2478 GNUNET_free (path_info);
2485 * Function to process paths received for a new peer addition. The recorded
2486 * paths form the initial tunnel, which can be optimized later.
2487 * Called on each result obtained for the DHT search.
2489 * @param cls closure
2490 * @param exp when will this value expire
2491 * @param key key of the result
2492 * @param get_path NULL-terminated array of pointers
2493 * to the peers on reverse GET path (or NULL if not recorded)
2494 * @param put_path NULL-terminated array of pointers
2495 * to the peers on the PUT path (or NULL if not recorded)
2496 * @param type type of the result
2497 * @param size number of bytes in data
2498 * @param data pointer to the result data
2501 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2502 const GNUNET_HashCode * key,
2503 const struct GNUNET_PeerIdentity *const *get_path,
2504 const struct GNUNET_PeerIdentity *const *put_path,
2505 enum GNUNET_BLOCK_Type type, size_t size,
2508 const struct GNUNET_PeerIdentity *pi = data;
2509 struct GNUNET_PeerIdentity id;
2510 struct MeshTunnel *t = cls;
2511 struct MeshPeerInfo *peer_info;
2512 struct MeshPathInfo *path_info;
2513 struct MeshPeerPath *p;
2516 if (size != sizeof (struct GNUNET_PeerIdentity))
2518 GNUNET_break_op (0);
2521 GNUNET_assert (NULL != t->client);
2522 GNUNET_DHT_get_stop (t->client->dht_get_type);
2523 t->client->dht_get_type = NULL;
2524 peer_info = peer_info_get (pi);
2525 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
2526 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2528 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path_head &&
2529 NULL == peer_info->dhtget)
2531 /* we don't have a route to the peer, let's try a direct lookup */
2532 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle,
2534 GNUNET_TIME_UNIT_FOREVER_REL,
2536 GNUNET_BLOCK_TYPE_TEST,
2539 /* key to look up */
2541 /* replication level */
2542 GNUNET_DHT_RO_RECORD_ROUTE,
2543 /* option to dht: record route */
2544 NULL, /* bloom filter */
2547 0, /* xquery bits */
2550 peer_info); /* closure */
2553 p = path_build_from_dht (get_path, put_path);
2554 path_add_to_peer (peer_info, p);
2555 tunnel_add_peer(t, peer_info);
2556 p = tunnel_get_path_to_peer(t, peer_info);
2557 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
2559 path_info->peer = peer_info;
2560 path_info->path = p;
2562 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2563 "MESH: new route for tunnel 0x%x found, has %u hops\n",
2564 t->local_tid, p->length);
2565 for (i = 0; i < p->length; i++)
2567 GNUNET_PEER_resolve (p->peers[0], &id);
2568 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH:\t%d\t%s\n", i,
2569 GNUNET_h2s_full (&id.hashPubKey));
2573 GNUNET_PEER_resolve (p->peers[1], &id);
2574 GNUNET_CORE_notify_transmit_ready (core_handle,
2580 GNUNET_TIME_UNIT_FOREVER_REL,
2584 sizeof (struct GNUNET_MESH_ManipulatePath)
2587 sizeof (struct GNUNET_PeerIdentity)),
2589 &send_core_create_path,
2591 path_info); /* cls */
2594 /******************************************************************************/
2595 /********************* MESH LOCAL HANDLES **************************/
2596 /******************************************************************************/
2600 * Handler for client disconnection
2602 * @param cls closure
2603 * @param client identification of the client; NULL
2604 * for the last call when the server is destroyed
2607 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
2609 struct MeshClient *c;
2610 struct MeshClient *next;
2612 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
2614 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
2618 if (c->handle != client && NULL != client)
2620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
2624 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
2625 if (NULL != c->tunnels)
2627 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
2628 &tunnel_destroy_iterator,
2630 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
2633 /* deregister clients applications */
2634 if (NULL != c->apps)
2636 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
2637 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
2639 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
2640 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
2642 GNUNET_SCHEDULER_cancel (announce_applications_task);
2643 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
2645 if (NULL != c->types)
2646 GNUNET_CONTAINER_multihashmap_destroy (c->types);
2647 if (NULL != c->dht_get_type)
2648 GNUNET_DHT_get_stop (c->dht_get_type);
2649 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
2655 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
2661 * Handler for new clients
2663 * @param cls closure
2664 * @param client identification of the client
2665 * @param message the actual message, which includes messages the client wants
2668 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
2669 const struct GNUNET_MessageHeader *message)
2671 struct GNUNET_MESH_ClientConnect *cc_msg;
2672 struct MeshClient *c;
2673 GNUNET_MESH_ApplicationType *a;
2680 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
2681 /* Check data sanity */
2682 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
2683 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
2684 ntypes = ntohs (cc_msg->types);
2685 napps = ntohs (cc_msg->applications);
2687 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
2690 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2694 /* Create new client structure */
2695 c = GNUNET_malloc (sizeof (struct MeshClient));
2697 c->id = next_client_id++;
2700 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
2703 GNUNET_MESH_ApplicationType at;
2706 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
2707 for (i = 0; i < napps; i++)
2710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
2711 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
2712 /* store in clients hashmap */
2713 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
2714 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2715 /* store in global hashmap, for announcements */
2716 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
2717 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2719 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
2720 announce_applications_task =
2721 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
2729 t = (uint16_t *) & a[napps];
2730 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
2731 for (i = 0; i < ntypes; i++)
2734 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
2736 /* store in clients hashmap */
2737 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
2738 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2739 /* store in global hashmap */
2740 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
2741 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2744 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2745 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
2747 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
2748 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2749 GNUNET_SERVER_notification_context_add (nc, client);
2751 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2753 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
2759 * Handler for requests of new tunnels
2761 * @param cls closure
2762 * @param client identification of the client
2763 * @param message the actual message
2766 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
2767 const struct GNUNET_MessageHeader *message)
2769 struct GNUNET_MESH_TunnelMessage *t_msg;
2770 struct MeshTunnel *t;
2771 struct MeshClient *c;
2772 GNUNET_HashCode hash;
2774 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
2776 /* Sanity check for client registration */
2777 if (NULL == (c = client_get (client)))
2780 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2784 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2787 /* Message sanity check */
2788 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2791 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2795 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2796 /* Sanity check for tunnel numbering */
2797 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2800 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2803 /* Sanity check for duplicate tunnel IDs */
2804 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
2807 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2811 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2812 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL at %p\n", t);
2813 while (NULL != tunnel_get_by_pi (myid, next_tid))
2814 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
2815 t->id.tid = next_tid++;
2817 t->local_tid = ntohl (t_msg->tunnel_id);
2819 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
2821 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2823 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
2824 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2827 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2831 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2833 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2834 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2837 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2840 t->paths = GNUNET_malloc (sizeof(struct MeshTunnelPath));
2841 t->paths->first_hops = GNUNET_CONTAINER_multihashmap_create(32);
2843 t->paths->root = GNUNET_malloc(sizeof(struct MeshTunnelPathNode));
2844 t->paths->root->status = MESH_PEER_READY;
2845 t->paths->root->t = t;
2846 t->paths->root->peer = peer_info_get(&my_full_id);
2847 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: adding root node id %u\n",
2848 t->paths->root->peer->id);
2849 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: own id is %s\n",
2850 GNUNET_h2s_full(&my_full_id.hashPubKey));
2851 struct GNUNET_PeerIdentity id;
2852 GNUNET_PEER_resolve(t->paths->root->peer->id, &id);
2853 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: id of peer is %s\n",
2854 GNUNET_h2s_full(&id.hashPubKey));
2855 t->paths->me = t->paths->root;
2857 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2863 * Handler for requests of deleting tunnels
2865 * @param cls closure
2866 * @param client identification of the client
2867 * @param message the actual message
2870 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
2871 const struct GNUNET_MessageHeader *message)
2873 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
2874 struct MeshClient *c;
2875 struct MeshTunnel *t;
2876 MESH_TunnelNumber tid;
2877 GNUNET_HashCode hash;
2879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel\n");
2881 /* Sanity check for client registration */
2882 if (NULL == (c = client_get (client)))
2885 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2888 /* Message sanity check */
2889 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2892 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2896 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2898 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2900 /* Retrieve tunnel */
2901 tid = ntohl (tunnel_msg->tunnel_id);
2903 /* Remove from local id hashmap */
2904 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2905 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
2906 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
2908 /* Remove from global id hashmap */
2909 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2910 GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t);
2912 // notify_tunnel_destroy(t); FIXME
2914 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2920 * Handler for connection requests to new peers
2922 * @param cls closure
2923 * @param client identification of the client
2924 * @param message the actual message (PeerControl)
2929 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
2930 const struct GNUNET_MessageHeader *message)
2932 struct GNUNET_MESH_PeerControl *peer_msg;
2933 struct MeshClient *c;
2934 struct MeshTunnel *t;
2935 MESH_TunnelNumber tid;
2936 struct MeshPeerInfo *peer_info;
2939 /* Sanity check for client registration */
2940 if (NULL == (c = client_get (client)))
2943 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2947 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2948 /* Sanity check for message size */
2949 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2952 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2956 /* Tunnel exists? */
2957 tid = ntohl (peer_msg->tunnel_id);
2958 t = tunnel_get_by_local_id (c, tid);
2962 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2966 /* Does client own tunnel? */
2967 if (t->client->handle != client)
2970 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2975 peer_info = peer_info_get (&peer_msg->peer);
2977 /* Start DHT search if needed FIXME: if not already connected */
2978 if (NULL == peer_info->dhtget)
2980 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_BLOCK_TYPE_TEST, &peer_msg->peer.hashPubKey, 4, /* replication level */
2981 GNUNET_DHT_RO_RECORD_ROUTE, NULL, /* bloom filter */
2984 0, /* xquery bits */
2986 (void *) peer_info);
2989 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2995 * Handler for disconnection requests of peers in a tunnel
2997 * @param cls closure
2998 * @param client identification of the client
2999 * @param message the actual message (PeerControl)
3002 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
3003 const struct GNUNET_MessageHeader *message)
3005 struct GNUNET_MESH_PeerControl *peer_msg;
3006 struct MeshClient *c;
3007 struct MeshTunnel *t;
3008 MESH_TunnelNumber tid;
3010 /* Sanity check for client registration */
3011 if (NULL == (c = client_get (client)))
3014 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3017 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3018 /* Sanity check for message size */
3019 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3022 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3026 /* Tunnel exists? */
3027 tid = ntohl (peer_msg->tunnel_id);
3028 t = tunnel_get_by_local_id (c, tid);
3032 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3036 /* Does client own tunnel? */
3037 if (t->client->handle != client)
3040 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3044 /* Ok, delete peer from tunnel */
3045 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3046 &peer_msg->peer.hashPubKey);
3048 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3054 * Handler for connection requests to new peers by type
3056 * @param cls closure
3057 * @param client identification of the client
3058 * @param message the actual message (ConnectPeerByType)
3061 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3062 const struct GNUNET_MessageHeader *message)
3064 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3065 struct MeshClient *c;
3066 struct MeshTunnel *t;
3067 GNUNET_HashCode hash;
3068 GNUNET_MESH_ApplicationType type;
3069 MESH_TunnelNumber tid;
3071 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3072 /* Sanity check for client registration */
3073 if (NULL == (c = client_get (client)))
3076 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3080 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3081 /* Sanity check for message size */
3082 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3083 ntohs (connect_msg->header.size))
3086 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3090 /* Tunnel exists? */
3091 tid = ntohl (connect_msg->tunnel_id);
3092 t = tunnel_get_by_local_id (c, tid);
3096 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3100 /* Does client own tunnel? */
3101 if (t->client->handle != client)
3104 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3108 /* Do WE have the service? */
3109 type = ntohl (connect_msg->type);
3110 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", type);
3111 GNUNET_CRYPTO_hash (&type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3112 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3115 /* Yes! Fast forward, add ourselves to the tunnel and send the
3116 * good news to the client
3118 struct GNUNET_MESH_PeerControl pc;
3120 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3121 pc.peer = my_full_id;
3122 GNUNET_CONTAINER_multihashmap_put (t->peers, &pc.peer.hashPubKey,
3123 peer_info_get (&pc.peer),
3124 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3125 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3126 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
3127 pc.tunnel_id = htonl (t->local_tid);
3128 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3129 GNUNET_SERVER_notification_context_unicast (nc, /* context */
3131 &pc.header, /* msg */
3132 GNUNET_NO); /* can drop? */
3133 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3134 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3137 /* Ok, lets find a peer offering the service */
3138 if (c->dht_get_type)
3140 GNUNET_DHT_get_stop (c->dht_get_type);
3142 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3143 GNUNET_h2s_full (&hash));
3145 GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL,
3146 GNUNET_BLOCK_TYPE_TEST, &hash, 10U,
3147 GNUNET_DHT_RO_RECORD_ROUTE, NULL, 0, NULL, 0,
3148 &dht_get_type_handler, t);
3150 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3156 * Handler for client traffic directed to one peer
3158 * @param cls closure
3159 * @param client identification of the client
3160 * @param message the actual message
3163 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3164 const struct GNUNET_MessageHeader *message)
3166 struct MeshClient *c;
3167 struct MeshTunnel *t;
3168 struct MeshPeerInfo *pi;
3169 struct GNUNET_MESH_Unicast *data_msg;
3170 struct GNUNET_PeerIdentity next_hop;
3171 struct MeshDataDescriptor *info;
3172 MESH_TunnelNumber tid;
3175 /* Sanity check for client registration */
3176 if (NULL == (c = client_get (client)))
3179 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3182 data_msg = (struct GNUNET_MESH_Unicast *) message;
3183 /* Sanity check for message size */
3184 if (sizeof (struct GNUNET_MESH_Unicast) +
3185 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
3188 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3192 /* Tunnel exists? */
3193 tid = ntohl (data_msg->tid);
3194 t = tunnel_get_by_local_id (c, tid);
3198 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3202 /* Is it a local tunnel? Then, does client own the tunnel? */
3203 if (t->client->handle != NULL && t->client->handle != client)
3206 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3210 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3211 &data_msg->destination.hashPubKey);
3212 /* Is the selected peer in the tunnel? */
3216 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3221 struct GNUNET_MESH_Unicast copy;
3223 /* Work around const limitation */
3224 memcpy (©, data_msg, sizeof (struct GNUNET_MESH_Unicast));
3225 copy.oid = my_full_id;
3226 copy.tid = htonl (t->id.tid);
3227 handle_mesh_data_unicast (NULL, &my_full_id, ©.header, NULL);
3230 GNUNET_PEER_resolve (path_get_first_hop (t, pi)->id, &next_hop);
3231 data_size = ntohs (message->size) - sizeof (struct GNUNET_MESH_Unicast);
3232 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor) + data_size);
3233 memcpy (&info[1], &data_msg[1], data_size);
3234 info->destination = pi->id;
3235 info->origin = &t->id;
3236 info->size = data_size;
3237 info->client = client;
3238 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
3239 GNUNET_TIME_UNIT_FOREVER_REL, &next_hop,
3240 /* FIXME re-check types */
3242 sizeof (struct GNUNET_MESH_Unicast),
3243 &send_core_data_unicast, info);
3248 * Handler for client traffic directed to all peers in a tunnel
3250 * @param cls closure
3251 * @param client identification of the client
3252 * @param message the actual message
3255 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3256 const struct GNUNET_MessageHeader *message)
3258 struct MeshClient *c;
3259 struct MeshTunnel *t;
3260 struct GNUNET_MESH_Multicast *data_msg;
3261 MESH_TunnelNumber tid;
3263 /* Sanity check for client registration */
3264 if (NULL == (c = client_get (client)))
3267 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3270 data_msg = (struct GNUNET_MESH_Multicast *) message;
3271 /* Sanity check for message size */
3272 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (data_msg->header.size))
3275 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3279 /* Tunnel exists? */
3280 tid = ntohl (data_msg->tid);
3281 t = tunnel_get_by_local_id (c, tid);
3285 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3289 /* Does client own tunnel? */
3290 if (t->client->handle != client)
3293 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3299 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3304 * Functions to handle messages from clients
3306 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
3307 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
3308 {&handle_local_tunnel_create, NULL,
3309 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
3310 sizeof (struct GNUNET_MESH_TunnelMessage)},
3311 {&handle_local_tunnel_destroy, NULL,
3312 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
3313 sizeof (struct GNUNET_MESH_TunnelMessage)},
3314 {&handle_local_connect_add, NULL,
3315 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
3316 sizeof (struct GNUNET_MESH_PeerControl)},
3317 {&handle_local_connect_del, NULL,
3318 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
3319 sizeof (struct GNUNET_MESH_PeerControl)},
3320 {&handle_local_connect_by_type, NULL,
3321 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
3322 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
3323 {&handle_local_unicast, NULL,
3324 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3325 {&handle_local_unicast, NULL,
3326 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3327 {&handle_local_multicast, NULL,
3328 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3334 * To be called on core init/fail.
3336 * @param cls service closure
3337 * @param server handle to the server for this service
3338 * @param identity the public identity of this peer
3339 * @param publicKey the public key of this peer
3342 core_init (void *cls, struct GNUNET_CORE_Handle *server,
3343 const struct GNUNET_PeerIdentity *identity,
3344 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
3346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
3347 core_handle = server;
3348 my_full_id = *identity;
3349 myid = GNUNET_PEER_intern (identity);
3350 peer_info_get(identity);
3351 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
3352 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
3353 nc = GNUNET_SERVER_notification_context_create (server_handle,
3355 GNUNET_SERVER_disconnect_notify (server_handle,
3356 &handle_local_client_disconnect,
3363 * Method called whenever a given peer connects.
3365 * @param cls closure
3366 * @param peer peer identity this notification is about
3367 * @param atsi performance data for the connection
3370 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
3371 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3373 // GNUNET_PEER_Id pid;
3374 struct MeshPeerInfo *peer_info;
3375 struct MeshPeerPath *path;
3377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
3378 peer_info = peer_info_get (peer);
3379 if (myid == peer_info->id)
3381 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3383 path = GNUNET_malloc (sizeof (struct MeshPeerPath));
3385 path->peers = GNUNET_malloc (sizeof (GNUNET_PEER_Id) * 2);
3386 path->peers[0] = myid;
3387 path->peers[1] = peer_info->id;
3388 path_add_to_peer (peer_info, path);
3393 * Method called whenever a peer disconnects.
3395 * @param cls closure
3396 * @param peer peer identity this notification is about
3399 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
3401 struct MeshPeerInfo *pi;
3404 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
3405 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
3411 for (i = 0; i < CORE_QUEUE_SIZE; i++)
3413 if (pi->core_transmit[i])
3415 GNUNET_CORE_notify_transmit_ready_cancel (pi->core_transmit[i]);
3416 /* TODO: notify that tranmission has failed */
3417 GNUNET_free (pi->infos[i]);
3420 path_remove_from_peer (pi, pi->id, myid);
3423 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3429 /******************************************************************************/
3430 /************************ MAIN FUNCTIONS ****************************/
3431 /******************************************************************************/
3434 * Task run during shutdown.
3440 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3442 struct MeshClient *c;
3444 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
3445 if (core_handle != NULL)
3447 GNUNET_CORE_disconnect (core_handle);
3450 if (dht_handle != NULL)
3452 for (c = clients; NULL != c; c = c->next)
3453 if (NULL != c->dht_get_type)
3454 GNUNET_DHT_get_stop (c->dht_get_type);
3455 GNUNET_DHT_disconnect (dht_handle);
3460 GNUNET_SERVER_notification_context_destroy (nc);
3463 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
3465 GNUNET_SCHEDULER_cancel (announce_id_task);
3466 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
3468 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
3472 * Process mesh requests.
3474 * @param cls closure
3475 * @param server the initialized server
3476 * @param c configuration to use
3479 run (void *cls, struct GNUNET_SERVER_Handle *server,
3480 const struct GNUNET_CONFIGURATION_Handle *c)
3482 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
3483 server_handle = server;
3484 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
3485 CORE_QUEUE_SIZE, /* queue size */
3486 NULL, /* Closure passed to MESH functions */
3487 &core_init, /* Call core_init once connected */
3488 &core_connect, /* Handle connects */
3489 &core_disconnect, /* remove peers on disconnects */
3490 NULL, /* Do we care about "status" updates? */
3491 NULL, /* Don't notify about all incoming messages */
3492 GNUNET_NO, /* For header only in notification */
3493 NULL, /* Don't notify about all outbound messages */
3494 GNUNET_NO, /* For header-only out notification */
3495 core_handlers); /* Register these handlers */
3496 if (core_handle == NULL)
3500 dht_handle = GNUNET_DHT_connect (c, 64);
3501 if (dht_handle == NULL)
3503 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Error connecting to DHT.\
3504 Running without DHT has a severe\
3505 impact in MESH capabilities.\n\
3506 Plase check your configuretion and enable DHT.\n");
3512 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3513 peers = GNUNET_CONTAINER_multihashmap_create (32);
3514 applications = GNUNET_CONTAINER_multihashmap_create (32);
3515 types = GNUNET_CONTAINER_multihashmap_create (32);
3518 clients_tail = NULL;
3523 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3525 /* Scheduled the task to clean up when shutdown is called */
3526 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
3529 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
3533 * The main function for the mesh service.
3535 * @param argc number of arguments from the command line
3536 * @param argv command line arguments
3537 * @return 0 ok, 1 on error
3540 main (int argc, char *const *argv)
3545 fprintf (stderr, "main ()\n");
3547 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
3550 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
3552 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");
3554 fprintf (stderr, "main () END\n");